Typewriting machine



`Iuly 10, 1923 www J. H. BARR TYPEWRITING MACHINE Filed May 14 1921 3 Sheets-Sheet 2 INVENTDR H15 ATTURNEY lJuly l0, E923- E'Ahll J. H. BARR TYPEWRITING MACHINE Filed May 14, 1921 y 3 Sheets-Sheet 5 WITNEEEES H 7% JMW# 00% Hl ATTURNEY lo mechanism for typewriting machines and l movement so that Bann, or NEW YORK,

PUY, or iLIoN, n

JOHN El.

N. Y., SSIGNOR T0 BEMINGTONITYPEWRITER COM- YOEK, A CORPORATION 0F NEW YORK.

TYPTING CHINE.

Application filed Hay m,

T o all whom it may concern:

Be it known that l, JOHN H. BARR, citizen of the United States, and resident of the borough of Manhattan, city of New York, in the county of New York -and State of New York, have invented certain new and useful w improvements in Typewriting Machines, of

which the following is a speciiication.

My `present invention relates to ribbon its objects are to provide new and improve means, irst, for vibrating the ribbon to cover the printing point during the type strokes; second, for varying the vibratory dilerent widthwise portions or .color iielads may be employed at will', and third, for `ispensingr entirely with the use of the ribbon when desired, as when making stencil or mimeograph sheets.

and other ends which will hereinafter appear my invention relates to the features of construction, combinations of devices and arrangementsof parts hereinafter described and particularly pointed out To the above in the claims.

, showing a ribbon In the accompanying drawings, 1 is a front to rear vertical sectional view of a typewriting machine embodying my present invention, parts of the machine 3o being omitted and parts broken away.

Fig. 18 is a fragmentary front elevation vibrator and its guide. v Fig. 2 is a vertical sectional view taken on a plane indicated by the dotted line 1-1 in Fig. 1 and looking rearward in the direction of the arrow at said line. Fig. 3 is a diagrammatic view showing a part hereinafter referred to as a settable actuator, 'said actuator being shown set as in Fig. 2.

Figs. 4 and 5 are diagrammatic views corresponding to Fig. 3 but showing the actuator set in diderent positions.

Fig. 6 is a vertical sectional view taken on planes indicated by the dotted line 2-2 in Fig. 2 and looking in the direction of the arrow at said line.

Fig. 7 is a fragmentary detail view ,on an enlarged scale showing the mounting o the settable actuator at the right-hand side thereof, the full line position corresponding to Fig. 3 and the dotted line positions at the right and left of the full line position corresponding respectively to Figs. 4 and 5. Fig. 8 is a vertical sectional view on an d the i921. serial no. estasi.

enlarged scale, said view being taken on a plane indicated by the dotted line .3f-3 in `ig. l and looking in the direction of the arrow at said line.

Fig. 9 is a horizontal sectional view taken on a 'plane indicated by the dotted line 4-4 in Fig. 8 and looking in the direction of the arrow at said line.

. Figs. 10 and 11 are Fig. 8 but showing diil'erent relationships o arts. i

Fig. 12 Ais a view on an enlargm views corresponding to fragmentary vertical sectional scale showing part of the train of elements composing the ribbon vibrating mechanism, the parts being shown in normal position as in Fig. 1.

Fi 13'is a view corresponding but s owing the parts in operated position.

Figs. 14 and 15 are views corresponding to Fig. 13 but omitting some of the parts shown insaid Fig. 13 and illustrating other1 arts in diierent relationships.

Themain frame of the machine comprises side plates orfframe members 1, as shown in Fig. 1, said side pla-tes being suitably connected at the front and rear, the front connection comprising a U-shaped frame 2 Vwhich encloses the keyboard. The side plates 1 are formed at the front with inturned lips or face portions 3 and are surmounted by top platesections 4. Above the main frame is arranged a platen 5, diagrammatically illustrated, said platen being mounted on a carriage which is adapted for movement from side underl the control 'of suitable mechanism, such for example as that shown in the application of E. E. Barney, Sr. No. l19,745, iiled October 26, 1920. Frinting key levers 6 .are provided with lkeys 7 and are fulci'umed on rods 8 mounted on a sub-frame `9 detachably secured to the main frame. The key levers are provided each with a slot 10 engaged by a p-in 11 projecting laterally'iti'om an angular lever 12, pivoted at 13 on said subframe, said angularflever bein Vconnected by a link 14 with a bell cran comprising arms 15 and 16 pivote-d at 17 on a supportl. Connected to thel shorter arm 15n of said bell crank is a restorin spring 19, thelonger arm of said bell cran extending rearward and carrying a pin 20 which engages in a cam slot 21 in a type bar 22 pivoted on a' ulcrum wire 23 secured to an upright type bar segment 24 that is to Fig, 12 l i the type barsextend lhorizontally vforward n invention may ate near the end from their pivots and rest a ainst a ad 25 mounted'on a support 18. he type ar segment`24 and the support 18 are suitably connected together and are adapted to be shifted to change case preferably by mechanism of the character disclosed ing win 1e, 1920.

pplication of John H. Barr and Ed- Barney, Sr. No. 403,780, filed August `It is to be understood however that my invention is not limited in its application to a shifting segment typewriting machine but that various features of said be adapted to machines employing shiftable platens. The type bars when their associate keys are depressed will be caused to cooperate with the front orprinting face of the non-shift platen 5. `ach type bar hasan actuating face 22 near its pivot, whichJ face is adapted toco-operof a printing stroke with a universal bar 26 which actuates carriage feeding or escapement devices nbt shown herein but which may correspond with those shown in they aforesaid application #419345. i

Each top plate section 4 is provided withJ 4a cup or depression 27 which accommodates a ribbon spool or carrier 28. Said ribbon spool is operatively connected with an upmachine.

isob

33 near its ends f andfxedly securing the associate crank arml ri ht shaft 29 which at its lower end carries a veled pinion 30 that is adapted to intermesh with a driving pinion v31 on a horizontal driving shaft 32 arranged within the .base and extending from side to side of the There are two driving inions 31 on the shaft 32 which is adapt to be shifted endwise to bring-said pinions alter.-

nately into mesh with ytheir associate ions 30. The shaft 32 is adapted to be turned or` operated from another shaft 33 by pawl and ratchet devices not shown herein but preferably ofthe construction illustrated in thel application of Edwin E. Barney, Sr. No. 456,907, filed March 30, 1921.

pin-

The shaft 33 is arranged below and parallel with the shaft 32 and is supported on rackets 34 which are secured by screws 35 to ythe sub-frame 9. Mounted on the shaft are crank arms 36, the left-- hand crank arm being by dot-and-dash lines. provided with a Acollar cross Each crank arm is 37 which receives a pin 38` passing through the shaft 33 36 thereto. Said crank arms extend upward nd are curved forward at theirupper ends,

upon by noses. or conon the printing key levers 6. Each time one of said key levers is actuated it not only causes a rinting operation of Athe rconnected type-bar 22 and an in the pendl .ate with t e secured by screws 50 `extends from side to the side frames 1 guide 53 is secured to the front face of t esegment 24, the

indicated in Fig. 1Y

otally connected with cross bar 39 which is` certain of the ribbon vibrating elements'asf, hereinafter described.

Wound on the ribbon spools 28 is a ribbon 41 which ma. be divided longitudinally into fields c an bhaving diiferent colors or characteristics. Said ribbon passes from the spools through guide slots 42 formed in the cups 27 and midway between the spools is threaded through a vibratory ribbonjguidmg device or vibrator designated asfa whole best shown in Figs.v

by the numeral 43, and 1 and J1. Said vibrator is vertically arranged in a transverse plane behind the ribbon spools and comprises a body portion or head 44, a stem 45 and pairs of'fingers 46 and 47 arranged to provide slots or guide openings indicated at 48. Said fingers ex*- tend upwardin parallelism and the outer pair 47 have their upper ends bent forward horizontall to provide stops that cooperupper edge of the ribbon to prevent accidental disconnection or displacement of the ribbon from the vibrator. The ribbon is threaded through the vibrator, passing through the guide slots 48, the printlng portion of said ribbon being that ortion which is exposed between said s ots. The side'portions of the vibrator co-operate with anv H-shaped guide member 49, the lower arms whereof are bent rearward and to a supporting mem- 51. Said channel. bar side of the "machine and is detachably secured near its ends by screws 52 to lugs l extendingupward from (Figs. 1 and 2). A type ber g or channel bar vibrator 43 being loosely confined between said type guide and the cross portion of said H-shaped guide. As

1n my prior construction, disclosed-in application Serial No. 404,721, the detachable-y channel bar provides a support for the ribbon vibrating mechanism including the `field changing devices so'Ythat/the detaching of said'channel bar detaches also a large part of said vibrating mechanism substantially as 'a unit. The lower end of the stem 45 of they vibrator is bifurcated to receive the forward end of a crank arm 54 which is pivpin 55, the normal position of the vibrator being maintained by. said vsupporting arm 54 so that the bon is below the line of the platen, as wi'll be understood from Fig. 1, wherein the printing point is indicated by the reference the vibrator by a cross printing portion of the ribflever provided at its menen character p. llt will be seen tbat""the unwound portion of the ribbon extends normall downward and forward from the sides of tlsie vibrator in straight inclined paths to the ribbon s ools, passing through the guide slots 42. ewed from the side, as in Fig. 1, the supporting or lever arm 54 is formed with a compound curve to provide clearance during its movements, said arm extending rearward and being formed at its rear end with a hub portion 56 which is perforated to fit over a rock shaft 57 to which the arm 54 is fixed' by a cross pin 58 passing through the hub. The arm 54 in effect is a crank or lever arm projecting forward from left-hand end. Said rock shaft takes bearings in three hanger arms or brackets 59, 60 and 61 which, as best shown in Fig. 2, are provided with horizontally bent top portions receiving headed screws 62`that are threaded upward into the channel bar 51. Each of said'horizontal portions is also scoured to the channel bar by two dowels 62. arranged at opposite sides f the -associate screw 62. The hanger arms are oit-set or curved rearward so that the rock shaft 57 is substantially clear of the channel bar at the rear side thereof. The hanger arm 59 is comparatively short but the other two hanger arms extend downward to a greater ,extent to provide supports for other parts.

A collar 63 is pinned or otherwise secured to the rock shaft 57 inside the hanger arm 61 and co-operates withsaid hanger arm to prevent endwise displacement of the rock shaft 57 toward the right. The collar portion 56, which is disposed the hanger arm 59, co-oprates with hanger arm to prevent endwise displacement of the rock shaft toward the left. Mounted yon the rock shaft 5 7, betweenthe hanger arm 60, 61, isA a downwardly extending arm or block 64, said arm being suitably xed to the rock shaft as by a cross pin 65. The bottom face of the arm 64 is perforated to receive the upwardly extending ends of a detachable Ushaped wire 66, said 4wire being arranged diagonally as viewed from the side as will be understood from Figs. 3.-5. The wire is driven upward into the block or arm 64 and thus fixedly secured to the arm, the two parts 64 and 66 constituting a unitary member or lower end portion wit a slot indicated at 67, said slot being formed by the space between the parallel sides of the U-shaped wire 66. The sides of the wire forming the sides or edges of slot 67 are straight, thus providing a straight slot 67 of uniform character throughout its length and substantially radial of the member 64, 66. By making said member in two parts it may readily be disassembled. The slotted arm '64, 66 (ro-operates with a setthe rock shaft 57 near its at the right of .said

lower' end Sit table actuating member designated as a whole by the lnumeral 68. The device 68 is preferably formed of a single piece of wire bent into the desired shape as will best be understood from a consideration of Figs. 2 to 5. As viewed from the front, the wire device 68 is bent to provide a number of portions which for convenience of description are designated as 68, 68", 68"', 68, 68, 68f, 68g, 68, 685, 68k and 68. The end p0rtions 68a and 68 are coaxial and provide bearing portions on which the device 68 is adapted to be turned or rotated. The portions 68, 68e and 68g are actuating or 0perating portions adapted to co-operate wit the wire loop- 66 to rock the lever member 64, 66 and the shaft 57 and tol actuate or move the vibrator. lt will be observed that these actuating portions are at dierent distances from, and parallel with, the pivota will communicate variable extents ofmovement to the arm 64, 66 for the same amount of rotation-of member 68. The inclined portions 68l and 68t which connect or join the actuating portions last above referred to are adapted .to insure a smooth and uninterrupted passage of the actuating device through the diagonally arranged wire loop 66 during the setting or sliding movements of the device 68. Theportion 68i is adapted to receive actuating or rotary movements communicated from the printing keys, while the portion 68k is adapted to co-operate with independent hand-operated setting devices for sliding the member 68 endwise to predetermined positions. The portions 68b and 68h serve merely to connect certain of the other portions and have no additional functions. 1t will be understood from Figs. 3-5 that the portions composing the one-piece member 68 when viewed from the front are all in one plane, this plane in the present instance being normally a vertical one, the y member 68 being in eifect a flat piece. The portion of the hanger arm 60 is perforated to provide a bearing opening that receives the bearing portion 68"* of the member 68 while at the right the bearing portion'68l bears, as best shown in Fig. 7 in a bushing 69 which is received in a perforation in the lower end of the hanger arm 61. The bushing 69 comprises a head or flange 69a a shoulder portion 69b and a nleck h 69" which latter-tits into the hole in the arm 61 and has its end upset or spread so as to force the face of; the shoulder portion 69?. against the opposite side of the arm 61 and thus clamp the bushing in place on the arm. Said bushing is centrally perforated' to provide a bearing opening the member 68. Saidmember, it'will be understood, is adaptedto be rotated inits bearings to actuate the vibrator, and also is adapted to be slid back and fbrth entlwise for the part 68 of lever or bell forward, the engaged in said bearing openings to'predetermined or set positions whereby the throw communicated to the vibrator may be Varied.

Referring first to the 'devices for communicating rotary movement to the'member`68 to actuate the vibrator at printing operations, said devices comprise, as best shown in Figs. 1, 2, 7 and 12, a plate-like `crank which .is rotatably mounted on the shoulder 69" of the bushing 69 and is loosely confined between the flange or head 69Bl and the adjacent face of the arm 61. The lever 70 is provided below its pivot with an open mouthed slot 71 through which passes the portion .68j of .the member 68. Forward of its pivot the lever 70 is provided with an elongated open mouthed slot indicated at 72 which is engaged by the pin .40 on the arm 36a. The lever member 0` is thus connected with the universal bar 39 so that when one Aof the printing levers 6 is operated and its contact 6a acts to swing the universal bar 39 rearward, this motion will be transmitted through the arm 36 and its extension 36 act against the side or sides'of the slot 72, swinging the lever 70 downward on its bear* ing 69. this movement being transmitted through the slot 71 to the portion 68j of the member 68 which portion is below the pivotal axis of said member, which axis passes` through the centers 68|a and 68'.

68 -is swung axis bythe lever 70 which also has its pivotal center in said axis, the portions of the member 68 above said 'axis will be swung one of said portions serving as an actuating ing the slot 67 so as to act againstkthe lever arm 64, 66 to swing said. lever arm forward, rocking the shaft 57 and swinging the arm 54 upward, causing saidarm to raise the. vibrator so as to present the ribbonopof the co-axial portions Consequentl as the portion posite the printing point on the platen andl 1n the path of the actuated type bar. For restoring the parts fof the ribbon vibrating mechanism to' normal position after operation, suitable spring devices may be provided, such devices being illustrated in Fig.

. 1 by dot and dash lines foi` the reason that lthey are preferably associated with thelefthand end portion of the rock shaft33 which for convenience of illustration is cut away insaid Fig. 1. The spring restoring devices comlprise av crank arm 73 having a hub'74 which fits over the end of the shaft 33 outside the left-hand bracket 34 and is secured to 'said shaft as by set screws 75. The end of lsaid crankarm is rounded and co-operates with the free end of a: leaf spring 76 which Yextends rearward just inside the lefthandI side plate 1, and is secured by screws 77 to a portionof said side plate. v The crank arm 73 extends upwardand'forward in an to the pin 40 which willrearward about said pivotall device and travers'" mitted to the rock shaft 91 piece inl the form of a downwardly extendion from the shaft 33 so that l of the crank arm 73 to restore the rock shaft 33, universal bar The vibratory be more specifically referred to hereinafter.

In orderto set or slide the actuating member 68 to different positions to vary the extent of" ribbon vibrating movement devices are provided 'which are best shown in Figs. 1-3, 6-9 and 12.k Said devices comprise a controlling member 7 Siwhich is preferably made of sheet metal and comprises a body portion .79, a'downwardly extending arm y80, and' a forwardly curved arm 81 which terminates ina forked or bifurcated end, the bifurcations 82 whereof loosely embrace the part, 68k of the member 68. At\ its left the body portionl79 is formed withy an open mouthed slot or wide cutout indicated at 83 while the top edge of said portion is formed with V-shaped depressions 84, 85 and 86. The edge of the cutout portion 83 of the member 78 bears on the shouldered portion of a j headed screw 87' which is threaded into the left-hand end ofan arm- 88, said arm terminating at its right in an angularly disposed head 89 which is secured by screws 90 to the inner face of the righthand frame plate 1. s lidably supported on the arm 88, being loosely confined between the head of the screw 87 and the front. face of said arm con. tiguous to said screw. Extending downward from the head 89 is a lug 89" which is forated to' receive the rear end of a horlzontally disposed rock sha-ft 91, said shaft extendmg forward and bearin front end in the intumed lip 3 o the righthand side' plate 1. .Pinned4 to the just forward of the lug 89, is a hub 92 of a crank arm 9.3, said crank arm [extending 39 and connected parts.

downward and being pivotally connected at its lower end at 94 to the `arm 8O ofthe arm 93 and near its left-handend by the headed shouldered screw 87. kA spring detent arm 95 secured by screws 96 tothe top ofthe yarm 88 has its free end bent into a V-shape to co-op'erate with the notches 84-86 in the member;b 78 to maintain said mem r in 'set positions. Said member is' varia-bly adjusted by hand operations transby a key or finger ing arm 97 having a hub portion 98 which fits over the end portion of the rock shaft 91 projecting forward through the lip 3, said arm 97being pinned oi' otherwise :secured to said shaft `in front of said. lip.` Extending upward from the hub`98 is 11n-indicating de- The member 78 is near itsshaft 91,

operations here outlined will Per' lan'

yice'or pointer 99 which co-operates with an printing point as illustrated in Fig. 13, said indicating device or plate 100 to indicate the figure showing the operated position of the A portion of the ribbon which may be in use. parts or the position to which they would l-`he indicating devices may be of any suitbe moved at printingv operation from the able character. normal position illustrated in Fig. 12. 70 Stop devices of novel construction are pro- Comparing Figs. 12 and 13. it will be videdi lfor co-operation with the shaft 91, observed that through the action of the said devices being illustrated in Figs. 1 and pin 40 against the lower side of the slot 8-11 and comprising a collar 101 which is 72 the lever or slotted device 70 has been lsecured. by screws 102 on the shaft 91 just swung downward .and backward on its 75 back of the .lip 3. Said collar 101 is pro- `pivot '6 9 through an angle of approxi'- vided at its front face with a lug 103 having mately 90 with the proportions of the angularly disposed stop faces 104 and 105 parts as shown in the present instance, that adapted to co-operate with portions of a the part 68i has been correspondingly pivoted stop member 106. Said member is turned through the` action of the side of 60 pivoted on a screw pivot 107, secured to the the slot 471, and as a result the lever 68 rear face of the lip 3, the member 106 lying has received a turning4 movement of su just behind said lip and depending loosely stantially 90 about its pivotal axis 68h, 68', from the pivot 107. The 'stop member 106 1s the operating or actuating portion 68 turnrovided with a finger piece 106 projecting ing about said pivotal axis from a position i eftward beyond the inner edge of the lip 3 above the same to a position substantially and readily accessible from the front, enin front of the same. As the part 68 abling the stop member 106 to be conventurns, it will act transversely of the slot iently manipulated by the operator. They 67 and against the forward side of the stop member 106 is cut out to provide stopv wire 66 or edge of the slot 67 to swing the 90 faces 108 and 109 and also astop lug 110, lever 64, 66 and will raise thel vibrator to said faces and said lug cooperating with theI operative position as has been described. faces of the lug or projection 103 to posilt will be `seen that the unusually long tively stop the shaft 91 in variable. positions, turning` movement or throw of the part 68 said shaft of course assit turns swinging the through substantially 90 and to a posicrank arm 93 and therethrough slidin or tion forward of its pivot, bringsit into moving the' controlling member7 8, w ich gsuch relationship with the front side of member through its forked portion 82 will the wire 66 that it will move substantransmit corresponding slidable movements tially lengthwise of the slot 67. That is,

to the actuator 68. any further movement of the part 68 from w@ color ribbon usually being blue orblack, the Y cent, maintaining The parts as they are illustrated in Figs. 1 the Fi 13 position would be substantially and 2 are set to vibrate the ribbon so as to aralle with the wire and would be inetpresent the upper ribbon field a, opposite the ective on the lever 64, 66, which would printing point, this iield in the case of a two`v remain substantially motionless or quieslower field b being red. The setting of the stantially in a position of rest with the ribparts corresponding to Fi 1 and 2 is also bon field a opposite the printing point. In illustrated in Figs. 3, 8 an 12. Considering other words, any movement of the operatthe member 78, it will be observed that it is ing portion 68 in and lengthwise of the held in set position by co-operation of the slotway 67 will transmit no appreciable U0 spring detent 95 with the middle detent notch motion to the vibrator. Furthermore, any 85, and thatthe stop face 104 of the lug 103 is tendency of the vibrator to rise above its engaged with the stop face 109 of the memprinting position or overthrow will nbe -ber 106. This adjustment ofthe member 78 blocked or prevented, since such further sets the forked portion 82 thereof in the pomovement would require corresponding ro- Bw sition shown in Fig. 2, with the result that taryymovement of the lever 64, 66, and the member 68 controlled and guided by said such rotary movement cannot take place, forked ortion has the actuating portion 68 since the part 68 is in the pathl of the d) with the wire or slotted portion 66 wire 66 and since 68 is on a dead center of the actuated member or arm 64, 66 so that it will act as a stop for 64-66 ln eect, said arm will receive vibratory movements then, `the parts 66 and 68 interlock to pre- I transmitted; through, the actuating portion vent overthrow of thel vibrator. rlhe cont org'device 68. Said portion is disposed at struction allows for considerable play or such a distance from the pivotal axisof the variation in the throw of the actuating member 68 that at printing operations the member 68 without affecting the uniform i portion 68 will'at against the slotted part throw of vibratory movement -of the viof arm 64, 66 to transmit a rotary movement brator from normal position to printing to said arm and vibrate the rock shaft 57 position. After the ribbon has beenl enough to raise the vibrator only far enough brought opposite the printing point and to prevent the ribbon ld a oppositethe arrested the train of actuating devices from it' r'bbon vibrator sub- W5.

the key u to and including the actuator 68 ma st1 l continue their movement withouta ecting the vibrator and without necessitating any stop'mechanism for arresting .the train, thus avoidin shock to the fingers of the operator an harmful reactlon of the parts moving under the impulse of the printing key. Also the necessity of line adjustments 'of the individ- 10 ual keyl levers in respect to the ribbon operating universal.

arts is obviated. Furthermore, the ribon will sition, without substantial vibratory movement during rapid operation of the' printing keys, thus-reducing the work of the fingers `in actuatingrthe ribbon `vibrating .mechanism during the printing strokes. f While in the present instance the throw L 'of the 'actuating part 68 is in the neighborhood of 90",I obviously .the extent of throw will vary accordingl to the'proportions of the parts and with change in their relative arrangement. Two yconsiderations lare involved. 'The lirs't is to provide that normally l planer of the actuating dvice '68 shall substantially coincide with the plane of the'lever'device 64,66 in order to 'insure'correct' initial position of the rib- A bon, this relation incidentally contributing vto freedom of adjustment. The second is 'that the plane ofthe actuating device 68 'shall be substantially .perpendicular to the radius passing through the slot'of the actu- -ating device 64, 66 when .the parts arein operated position in order to lnsure interlocking and thus to prevent-overthrow.

Assuming that it is desired to change ribbon fields or colors, that is, when it is ldesired to write in lower. ribbon field b orlred ribbon lield of the ribbon 41 thev operator pushes the key or linger iece 97 toward Athe right, thereby'turning tlib ock shaft 91 in the direction of the 5 movement of the rock shaft will continue until it and the connected parts are positively arrested by engagement ofthe 'stop face 105 on the-lug 103 wit `the nose 110 on the pivv,o ted statlonary stop member 106 as shown 0 in Fig.v10. It will be observed that. this turning movement of the rock shaft has\car f ried the stop face 104 of the lug out of conl.tactiv'e engagement with the stop face 109 on the pivoted stop `106, these two co-operating to arrest the rock shaft-91 and f-.connected arts in positionfor writing on the blue field of the ribbon as illustrated in F1g..8. In other words, the rock shaft 91 is positively arrested forprinting in the blue 0 feld'bythe. enga ement of the stop faces-104A and-109 (Fig. 8 and is likewise ositively arrested for writing in the red field by the engagement of the stop face-105 with the stop nose 110, as illustrated in Fig. .10. The

turnlng movement of the rock shaft 91 fromv bar 39 and connectedl arrow in Fig. 8. This,4

stop faces@ be maintained in its printing poderstood from extreme right-hand position and will be held V set therein ,by'the detent devices. During this movement it will be observed the to edge of the slot 83 will ride over the shoui der portion of the screwl 87, the member 85 moving freely between the head of thescrew and theface of the arm 95, 'as will bef un- -consideration of Fig. 12. It will be apparent that the sprin 95 not only operates as .a' detent sprlng) preventsundue separation or displacement of the. member 78 from its supporting screw 87, ,so that even though the bottom of the 8 will be in its 8 to the 9-position will be trans- 4 ut also slot 83 is open the screw 87 will not`disen- Y gage from it. Theadvantageof the open slot constructionofcourse is that the part-78 may'be readily-assembled and disassembled vrelative .toits associate parts. The ends of to the F transyerselv of th the slot are shaied to seat the shoulder of the screw 87. sa, result of the ridhtward movement of the member 78 last Aa ove described t'he bifurcated or forked'portion 82 of said member will move from the Fig. 3 ig. 4 positionand said forked portion, by reason of its engagement with the part. 68". of the member member rightward on its pivots or bearings vslotted member 64, 66 from the aresult of such sliding movement, the operating portion 68 will be moved rightward out of engagement with the lower portion 66 of the lever arm 64, 66 and the i portion 68 will, be. brought into the slot 67 68, will slide-said Fig. 3 tothe Fig. 4 position. AsA

.H0 operating l lus4 68 and 68 will pass freely through the-slot 67 without contacting with rovid'ed the member 68 is 4in the vertical or gull normal position. Itr may sometimes happen, however, that the pivoted actuator 68 wilvlnot lie in its vertical position but will occupy a plane somewhat inclined thereto. Thls will occur,\ operator actuates the field chan r while holding down a printing key, as requently happens; or it maybe that the actuator 68 for example, if the may-stickfor for some other reason fail to complete its return movement.

In any such event, however, the parts of the field changer the wire loop 66 A 25 tioned and adjusted that as a result of the pivotal axis 68,, 68.

will not be obstructed or blocked, owing to movement of the-rock shaft 91 will swing' the (zo-operation between the inclined por the crank arm 93 from the left toward the tion 68d and the diagonally arranged wire. right 'and move `the controller 78 rightward 66. The same thing holds true regarding a until the fork or bifurcation 82 thereof is leftward switching or sliding movement of brought to the Fig. position. The conthe member 68 and of course applies to the troller will be maintained set-Yin this posiinclined portion 68 as well as to the inclined tion by co-operation of the detent spring portion 68d. In other words the diagonal 95 with the detent notch 86. This moveor staggered wire construction insures that ment of the controller 78 serves correspondthe device 68 shall not be blocked under any ingly to lmove the member .68 to the Fig. 75 conditions during its sliding movements. 5 position, said member being maintained As aresult of bringing the operating porset in this position by the ork 82. lt will tion 68c of theoscillatory member 68 into be observed from consideration of Fig. 5 as operative relationship with the oscillatory well as Figs. 3 and 4, that while the fork w member or lever 64, 66 said lever will re- 82 is effective to slide the member 68 back '80 ceive a greater extent of actuating moveand forth in its bearings and to maintain ment at each printing operation due to the said member set in predetermined positions, fact that the operating portion 68c is furconsidered lengthwise, nevertheless, said ther from its center of movement than the fork does not interfere with vibratory or rooperating portion'68e. The actuated arm of tary motions of the member 68 since the 35 the member 64, 66 .of course remains the fork is open at the front side, providing same in all cases and 'is equal to the distance an open mouthed slot 82a which aords unfrom the actuated rlpart 68i to the pivtal axis obstructed vibratory fore-and-aft moveof member 468. he parts are so proporlments of the vertical lportion 68k about its s a result of setting 90 eater swing communicated to the lever 64, the member 68 in the Fig. 5 position the op- 66 the vibrator will be raised to a greater erating portion 68g is brought into operative height and far eno gh to present the lower relationship ,with the slot 67 so that wnen ribbon field b opposite the printing point p the keys are depressed said-portion 68g will on the pla-ten 5. The opera-ted positions of act on the lever 64, 66. In the present in- 95 thelever 70, the member 68 and lever 64, 66 stance the operating portion 68d is slightly for, the lower ribbon field are illustrated in below the pivotal axis of the memberV 68 so Fig. 14. It will be observed that the parts that at printing operation the portion 68.g 68 and 66 provide an interlock to prevent under impulse transmitted to the part 68j w overthrow of the vibrator but that this infrom the lever 70 will act against the wireowo terlock is not rigid or unyielding and per- 66 at the rear of the slot 67 and will swingy mits movement pf the art 68c substantially the lever 64, 66 slightly .toward the rear'to lengthwise of the slot 6g without doing away the operative position s own in Fig. 15;

with the interlocking or stoppingl function This movement will be transmitted, of

40. of the part 68C. The same thing is true ot 'coursefto the lever arm 54, swinging or 105 parts 68c and 68g when they are in co-operaslightly lowering the lever arm from nortion with the part 66. mal position. In other words,at each printlli it bedesired to cut out the ribbon or in g operation the vibrator will be given a silence its vibrations at printing operation slight reverse movement, carrying the ribas is the case for example when the typebon down a little below its normal position. 110

writing machine is employed for making This construction is preferred, since it enstencils, then assuming the rock shaft 91 ables the ribbon to be adjusted normally to be eithery in the Fig. 8 or Fig. 10 posiclose up to the printing point so that the tionthe operator need only grasp the finger extent of its printing throws may be reduced' i piece 106a and press upward against it. to a minimum. At the same time the likeli- 115 This pressure is transmitted through the hood of the types catching on the ribbon nose 110 to the lug 103 to the collar 101 during stencil work is reduced by causing and thence to the rock shaft 91 which will downward movement of the ribbon at stencil be turned until arrested by the engagement printing operations so that the danger o of the stop face 104 with the stop face 108 the ribbon foulingthe types when the ribbon 126 near the inner or right-hand end of the is in disuse is obviated. Tt will be observe latter. During this movement it will be that the two arms or lever members 54 and understood that the member 106 will turn 64, 66 provide in effect a bell crank lever about its pivotal axis 107 while. the rock having an elongated axle or pivotal portion @o shaft 91 will turn about its longitudinal axis. 57; also that the portion 68j is of such length 125 Upon the inger piece 106a being released that it will always co-operate with the the member 106 will swing back idly toward slotted lever -71 whatever the lengthwise the right until arrested in the Fig. 11 posiposition of the member 68, and that the tion, this movement of course not affecting member or actuator 68 during its operating w V the rock shaft 91. The last described rotary movements on the arm 64, 66 is wholly self- 136 zontally disposed rock shaft extending froml guided or self-directed, turning about its pivotal axis and not being controlled as to its course of movement by any separate guidingr device.

7arious 'changes may be made without departing from my invention.

What I claim as new and desire` to secure by Letters Patent, is, l

1. In a front strike typewriting machine,

the combination of a vertically` arranged` ribbon vibrator; and means for variably actuating said vibrator comprising a horithe middle of the machine toward one side thereof, a horizontally arranged lever arm carried by said rock shaft near one end and pivotally connected with said vibrator, a

arm fixed to vsaid rock shaftslotted crank near its other end and extending downward therefrom, a lever.member constantly er1- gaged` with the slot in said crank arm and provided with a tions, .means for setting said lever member to bring vany selected one of said actuating portions into use, printing keys, and connections between said printingv keys and said lever member.

2. In a typewriting machine, the combination of a ribbon vibrator, printing keys,

vibrating connectionsbetween said printing keys and said ribbon vibrator including a slot lstraight member provided. with a throughout its entire length, and an actu.-

ator in engagement with said slot and operative during part of its movement while traversing said slot to actuate said member to move the vibratorv to the printin point, said actuator being wholly7 self-gui ed and while moving in said slotduring the Ilatter part o its movement being substantially ineffective to move ,said member and said vibrator,

v tion of a 14.5.

3. In a typewriting machine, the combinaribbon vibrator; printing keys; and vibrating connections between said printing keys and said ribbon vibrator including a pivoted member provided with a slot radial throughout its length,- and an actuator wholly self-guided and adapted to engage and move inl said slot, said pivoted Amember remaining quiescent during part of the movement of said actuator in said slot.

In atypewriting machine, the combination of a ribbon vibrator; printingQkeys;

land vibrating connections betweenV said printing keys and said ,ribbon vibrator including a pivoted member provided with a straight slot andan actuating device `engalging in said slot wholly self-guided throug out .its entire actua-ting movement, partof the actuating movement of said device being transverse of said slot and part being substantially vlengthwise of said slot.`

In a typewriting machine, the oombina. tion of'a ribbon vibrator; printing keys; and

Vvibrating connections between plurality of actuating porl vibra-ting'connections between said printingkeys and said ribbon vibrator including a pivoted member provided with a straight y slot, and a pivotally mounted actuating device engaging with-said slot, ,said actuating device receiving turning movements of substantially 90 from the printing keys so that it is enabled during part of its movement `to press against one side of said straight slot and during another part of its movement to move in said slot without operatively pressing against it. j

6. In a typewriting machine, the combination of a r'bbon vibrator, printing keys, and said printing keys and tworotary members, one provided with a slot that is vstraight 4throughout kits length and the other member having a portion engaging in said'slot,said portion and said slot having a relative movement partly said ribbon vibrator comprising;

7. In a typewriting machine, the combinav tion of a ribbon vibrator; printing keys; and vibrating connections between said printing key and said ribbon vibrator including a. pivoted member provided with a radial slot and an actuator adapted to move in said slot and being wholly self-guided during its movement, `the actuator during part of such movement bein ineliective to transmit movement to said pivoted member but at the Sametime preventing any movement on the part of said pivoted member.

8. `In a typewriting machine, the combination of a ribbon vibrator; printing keys; and vibrating connections between said printing keys and said ribbon vibrator including a pivoted member provided with a slot that is straight throughout its length, and a secondv member having an actuating.; device .that is adapted to move in said slot, fthe second membergbeing wholly self-guided and duringpart of such movement being ineffective to transmit movement to said rst recited member but atl the same time reventing any movement on the part of said first recited member.

9. Ina t pewriting machine, the combina b printing keys; and f' and'vibrating connections between said keys los iis

substantially l `10. In a typewriting machine, the combination of a' ribbon'vibrator; printin keys;

ber provided with a throughout its length gaging in said slot and being wholly selfguided during its actuating movement, said actuator when moving lengthwise of said vslot being ineffective to move and at the same time serving as a stop to revent said member froml being moved.

11. In a typewriting machine, the combination of a ribbon vibrator; printing keys; and vibrating connections between said printing keys and and an actuator ensaid vibrator including a 4 pivoted member provided lwith a substanof said member and an-actuator adapted to co-operate 'l only with said face,said actuator moving in a path partly at an angle to said edge `and partl substantially parallel with said edge, said, pivoted member remaining quiescent during the parallel movement of said actuator, and said actuator at such to prevent pivotal time servin as asto movement o said mem er, said actuator'beiig at all times self-controlled or guided. 13. In a typewriting machine, the combination of a ribbon vibrator; printing keys;

and vibrating connections between said p printing keys and said ribbon vibrator'inil cluding a pivotedmember'provided with a straight slot, and a pivotally mounted actuating device engagng with said slot, said actuating device receiving turning movements of substantially 90 from the printing keys, said actuating device`near the end of its turning movement providing a stop that prevents movement of said member about its pivot. v

14. In a typewriting machine, the combination of a ribbon vibrator; printing keys; and vibrating connections between said keys and said vibrator including a movably mounted member having a single slot that is straight throughout its length. and a Y pivotally mounted member provided with` a plurality of actuators selectable at will'to co-operate with said first recited member, each of said actuators being adapted tomove in said slot, said irst'recited member being actuated during the first part of such movement but remaining quiescent duriu g' thelat ter part of such movement. l

the combislot that is straightl said member l d printing keys transmitt'ble `device receiving vnation of a ribbon vibrator;

nation and vibratin and said vvi ratdr including two pivoted members that are connected together, one of said members actuating the other and being provided with a plurality of actuating de vices selectable at will to co-operate with the of a ribbon vibrator, printing keys,

A actuated member, certain of said devices being adapted to move the actuated member in opposite direction from its normal position. 16. lIn a typewriting machine, the combination of a ribbon vibrator; printing keys;

and vibrating connections between said keys and said vibrator including. a slotted inember, and a one-piece Amember having- ,a continuously extending part rovided with a plurality of actuating ortions selectable at will to co-ope'rate with t eslot in said slotted member, each of said actuating portions being adapted `to move the vibrator to a different extent from all of the other actuating parts, said one-piece member also includinga art which receives impulses from the to all of said actuating parts.

17. In a typewriting machine, the combination of a ribbon vibrator; printing'keys; vibrating connections between said keys and said vi ltor comprising an actuated memb er an a 'one-piece member having a continuously* extending part provided with a plurality of actuating portions and. also a portion which receives impulses from the printing keys and hand-operated means' for settin said one-piece member so as to' bring anyv esired one of its actuating portions into co-operative relationship with s'aid act- ',uated member, the .impulse-receiving portion of said one-piece member receiving imulses from the printing'keys for all of the set positions.

i, 18. In a typewriting machine, the combination of a ribbon vibrator; printing keys; vibrating connections between said printing keys and said ribbon vibrator including a pivoted member provided with a straight slot, and a pivotally mounted actuating de-l vice engaging with said slot, said actuating turning movements of substantially 90 from means for variably setting said .actuating device to change its relationship-with said slot and vary the throw of the ribbon vibrator. 19. In a typewriting machine, the combiprinting keys; vibrating connections between said printing keys and said vibrator including a pivoted member provided with a substantially radial edge or face, and an actuator adapted to move both in a path partly at an angle to said edge and also partly substantially parallel with said edge, said pivoted 4member remaining uiescent during the parallel movement o said actuator; varying the normal relationship oi sai the printing keys; and` connections between said keys eoV and means forv yactuator with said edge to vary the'throw eration.

of thel ribbon vibrator at the printing op- 20. In a typewriting machine, the combination of a ribbon vibrator, printing keys, a lever arm havi connections with said vibrator land provi ed with a slot, a pivoted actuator engageable with saidl slot, and a lever member having connectionsl with said printing keys and being veo-axial with said actuator, said lever member transmitting impulses from said` printing keys to said actuator. y

21. In a typewriting machine, the combination of a ribbon vibrator, printing keys, a lever arm having connections with said vibrator and provided with a actuator 'engageable with said slot, a lever member having connections with said printing keys and being co-axial with said actuator, said lever member transmitting impulses from said printin and means for sli pivots tov vary its said slot.' l

22. In a typewriting machine, the combination of a ribbon vibrator, a vibrator lever, a pivoted one-piece actuator for said lever,J said actuator comprising actuating parts for said vibrator lever arranged at different distances from its pivotal axis, and a key operated lever for transmittingthe impulses from the printing keys to said actuator, said actuator being slidable on its pivots to vary its engagement with said vibrator lever and change the throw of` the vibrator, .the engagement of the actuator in both of the keys vto said actuator, 'ng said actuator on its normal relationship with sitions to which it may. be slid being with the same contact face ofthe vibrator lever.

23. In a ty writing machine, the combination of a ri bon vibrator, a vibrator lever, a pivotedactuator for said lever, land a key operated lever for 4transmitting impulsesfrom the printing keys to actuator being slidable on its engagement with said chan ethe throw ofthe vibrator, said actuator V ing constituted by a one-piece meinber' comprising actuating parts arranged in a single plane at different distances from its said actuator, said its pivotsto vary vibrator lever and pivotal axis at one side thereof, and lfurther comprising a part arranged in the same plane b ut at the opposite side of the pivotal axis, said last named part (ao-operating with said key operated lever.

24. In a typewriting machine, the combination of a ri bony. vibrator, a vibrator lever, a. one-piece pivoted actuator com rising a plurality of actuating parts fora ternatve engagement with said lever and arranged in a single plane at diiferent distances from its pivotal axis aty one side thereof, andlfurther comprising an impulse-receiving part, and a key operated lever formed with a.

slot, a pivoted from the pivotal axis, all

with said lever, the

f. said. actuator.

' diagonally Adisposed tol the the combination of slot with which said impulse-receiving'part constantly engages. l

25. In a typewriting machine," the combi? keys to said actuator, said vactuator being slidable on its its engagement with `said vibrator lever and change thel throw of the vibrator, said actuator being constituted by a Wire bent to pr0- vide co-axial pivotal p actuating arts at different distances from the pivotalp axis `and also a part for engagement with said key operated lever, all of said actuator parts lying in a single plane which also contains the pivotal axis of the actuator. 226. In a typewriting machine, [the combination of a ribbon vibrator; a vibrator lever; a pivoted actuator for said lever' operated lever, for transmitting the impulses from the printing keys to' said actuator, said actuator being slidable on its pivotal support to vary its engagemenvwith said vibrator lever and change the throw of the vibrator, said actuatorcomprising a wire bent. to pro- ,vide co-axial pivotal portions, and a plurality of actuatingA parts at ,diilerentdistances ofJ said actuator parts lying in a single plane which also con-4 tainsjthe pivotal, axis of the actuator, the actuator. being settable to vary the ribbon throw by movements of translation in its own plane.` L

27. Ina typewriting machine, the combination of a ribbon vibrator, 'a lever with which said vibrator is pivotally connected, said lever comprising a slotted portion; anA

engaging said slotted actiator for said lever portion and adapted or'sliding movement therethrough to vary its said relationship sides of the slot lbein dia onally disposed to the plane in whic sai actuator is slidable; printing keys; and connections between said printing keys and 28. In a typewriting machine, the combination of a which said vibrator is pivotally connected, said lever comprising a slotted portion; an actuator for said lever engaging .Said slotted portion andadapted for sliding movement therethrough to vary its said-relationship with said lever, the sides of the slot being lane in which said actuator is slidable, said) actuator comprising a plurality of parallel actuating portions and da onally disposed connecting portions; rinting ke s; and connections between saidiprinting cys and said actuator.

29. In a front strike typewriting machine, ,an upright ribbon vibrator, pivot and to which said vibrator is pivotally ortions, a plurality of land a key ribbon vibrator; a lever with a bellcrank` having an I elongatedvv I with said slotted lever,

vers o erative on said J recited arm,

and a rock shaft connected2 a pivotally mounted actuator engagin said bell crank, a slotted `lever mounted co-axially with said actuator and operative thereon, 'an arm having a pin engaging a unlversal bar frame with which 'said arm is rigid, and printing key levers operative on said universal bar frame.

30. In a front strike typewriting machine, the combination of an upright ribbon yibrator, a horizontally disposed lever arm pivotally connected with said vibrator a downwardly extending lever arm provi ed with a slot, an actuator pivotally mounted and adapted for sliding movement on its pivots to vary its normal relationshi with said slot, a slotted leverco-axial wit said actuator and operative thereon, an arm having a pin-and-slot connection with said slotted lever, a' universal bar connected with said last recited arm, and printing key leuniversal bar.

3l. n a 4front strike typewriting machine, the combination of an upright ribbon vi brator, a horizontally disposed lever arm pivotally connected with said vibrator, a downwardly extending lever arm provided with a slot, an actuator pivotally mounted and adapted for sliding movement on its said slot, a slotted lever co-axial with said actuator and operative thereon, an arm having a pin-and-slot connection with said slotted lever, a universal bar connected with said last printing key levers operative on said universal bar, type bars connected to said key levers, and a second `universal bar operative by said type bars, said second uni# versal bar being tor the escapement mechanism of the typewriting machine.

32. ln a ,front strike typewriting machine, the combination of an upright ribbon vibrator; a horizontally disposed lever varm pivotally connected with said vibrator; a downwardly extending lever arm provided with a slot; an actuator pivotally mounted and adapted for sliding movement on its pivots to vary its normal relationship with said slot; a slotted lever co-axial with said actuator 'and operative thereon; an arm having a pin-and-slot connection with said slotted lever; a universal bar connected with said last recited arms; printing key l levers operative on said universal bar; and hand-operated devices for sliding said actuator to vary its normal setting, said handi operated devices comprising a controller hloosely connected to said actuator, a crank arm pivotally connected to said controller, to :which said crank arm is secured. l I l 33. ln ribbon field changing mechanism for typewriting machines, the -combination of an actuator settable, toA vary the throw ot pivots to vary its normal relationship with the ribbon; a rock shaft, connectionsbetween said rock shaft and said actuator; and stop devices for positively arresting said rock shaft compnsing a pivoted stop member provided with a plurality of stop faces and having both. to control said pivoted stop member and also to communicate movement to said rock slaft and to said actuator independently o the printing keys of themachine, saidr rock shaft also being provided with a lfinger piece by which it and said actuator may be moved independentlyv of said piv- .oted stop member. g i 4 i 34. In ribbon field changing mechanism for typewriting machines, the combination of an actuator settable to vary the Jthrow of the ribbon; a key operated rock shaft; and connections between said rockf shaft and said actuator, said connections comprising a crank arm on said rock shaftand a controller pivotally connected to said crank arm and formed with an open mouthed slot, the closed side of said slot having a slidable engagement withd a stationary part, said controller having a loose connection with said actuator.

35. ln' ribbon ield changing mechanism for typewriting machines, the combination of an actuator settable to vary the throw of the ribbon; a key operated rock shaft; -cona finger' piece effective nections between' said rock shaft and said actuator, said connections comprising a crank arm'on said rock shaft and a controller pivotally connected to said crank arm formed with an open mouthed slot, the closed side of said slot having a slidable engagement with a stationary part, said contrgller beng provided with a forked arm engaging with said actuator; andldetent devices for said controller, said detent devices comprising a spring arm which also assists to maintain said controller slidably engaged with said ixedpart.

36. ln a typewriting machine, the combination of a ribbon vibrator; printing keys; a lever arm having connections with said vibrator and provided with a slot; a pivoted actuator engageable with said slot; a lever member said printing keys and being co-axial with said actuator, said leverl member transmitting impulses from said printing keys to said actuator; and means for sliding Vsaid actuator on its pivots to vary its normal relationship with'said slot, said means comhaving connections with' 'iet prising a controller having a loose connection with said actuator, a rock shaft connected with said controller and provided with a finger piece or key, and stops forpositively arresting said rock shaft in any one of three predetermined positions.,

37. In a typewriting machine, the combi nation of .a ribbon vibrator; printing keys;

a lever armhaving connections with said viv comprising a npivote'd stop member provided l5 brator and provided with a slot; a pivoted. with a plurality of stop faces to arrest said .actuator en ageable with said slot; a lever rock shaft and havin a finger piece effective member having connections with said print.- both to control .sail pivoted stop member f ing keys and being co-axial with saidl actuaand also to communicate rotary movements tor, said lever member transmitting imto saidrock shaft. 20

' pulses from said printing keys to said actua- Signed at the lborough of Manhattan, city tor; means for slidingsaid actuator' on its of New York, in the county of' New York vpivots to vary its norma-1 relationship with and-State of.` New York this 13th day of;l

l" said slot, said means comprisin a controller May, A. D. 1921.

- having a loose connection `wit said actua- JOHN H. BARR. tor, and a rock shaft connected with said Witnesses: r controller and provided with a finger piece E. M. WELLs, or key; and stop devices-for said rock shaft CHAnLEs E. SMITH. 

